inject-secrets.php

<?php

use Cspray\AnnotatedContainer\Attribute\Service;
use Cspray\AnnotatedContainer\Attribute\Inject;
use Cspray\AnnotatedContainer\ParameterStore;
use Cspray\Typiphy\Type;

class MySecretParameterStore implements ParameterStore {
    
    public function getName() : string {
        return 'secrets';   
    }
    
    public function fetch(Type $type, string $key) : mixed {
        // Something you'd implement to retrieve the value from your secrets store
        return fetchFromVaultOrAwsSecretsOrSomewhereElseSafe($key);
    }
    
}

#[Service]
class SomeApiClient {

    public function __construct(
        #[Inject('my-api-key', from: 'secrets')] 
        private readonly string $apiKey
    ) {}
    
}

$compiler = ContainerDefinitionCompilerFactory::withoutCache()->getCompiler();
$containerDefinition = $compiler->compile(
    ContainerDefinitionCompileOptionsBuilder::scanDirectories(__DIR__ . '/src')->build()
);

$containerFactory = new AurynContainerFactory();
$containerFactory->addParameterStore(new MySecretParameterStore());
$container = $containerFactory->createContainer($containerDefinition);

// The value returned from they 'my-api-key' passed to MyParameterStore::fetch will be injected
$myClient = $container->get(SomeApiClient::class);